./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_3_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_3+newton_3_5.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 41039e1ca02f0c1a8ce2142160f9ec0f4ca3178e082edea8dc4d2cb9edc06efd --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 08:49:29,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 08:49:29,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 08:49:30,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 08:49:30,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 08:49:30,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 08:49:30,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 08:49:30,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 08:49:30,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 08:49:30,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 08:49:30,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 08:49:30,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 08:49:30,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 08:49:30,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 08:49:30,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 08:49:30,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 08:49:30,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 08:49:30,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 08:49:30,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 08:49:30,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 08:49:30,065 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 08:49:30,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 08:49:30,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 08:49:30,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 08:49:30,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 08:49:30,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 08:49:30,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 08:49:30,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 08:49:30,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 08:49:30,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 08:49:30,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 08:49:30,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 08:49:30,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 08:49:30,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 08:49:30,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 08:49:30,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 08:49:30,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 08:49:30,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 08:49:30,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 08:49:30,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 08:49:30,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 08:49:30,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 08:49:30,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 08:49:30,143 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 08:49:30,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 08:49:30,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 08:49:30,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 08:49:30,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 08:49:30,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 08:49:30,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 08:49:30,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 08:49:30,145 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 08:49:30,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 08:49:30,146 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 08:49:30,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 08:49:30,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 08:49:30,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 08:49:30,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 08:49:30,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 08:49:30,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 08:49:30,148 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 08:49:30,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 08:49:30,148 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 08:49:30,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 08:49:30,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 08:49:30,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 08:49:30,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 08:49:30,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:49:30,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 08:49:30,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 08:49:30,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 08:49:30,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 08:49:30,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 08:49:30,151 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 08:49:30,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 08:49:30,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 08:49:30,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41039e1ca02f0c1a8ce2142160f9ec0f4ca3178e082edea8dc4d2cb9edc06efd [2022-07-12 08:49:30,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 08:49:30,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 08:49:30,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 08:49:30,413 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 08:49:30,414 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 08:49:30,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_3_5.i [2022-07-12 08:49:30,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e6f5f99/fcf69e2524b14a7ab43221c4750de2d8/FLAG4e0520abe [2022-07-12 08:49:30,860 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 08:49:30,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_5.i [2022-07-12 08:49:30,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e6f5f99/fcf69e2524b14a7ab43221c4750de2d8/FLAG4e0520abe [2022-07-12 08:49:30,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e6f5f99/fcf69e2524b14a7ab43221c4750de2d8 [2022-07-12 08:49:30,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 08:49:30,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 08:49:30,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 08:49:30,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 08:49:30,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 08:49:30,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:49:30" (1/1) ... [2022-07-12 08:49:30,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6befc37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:30, skipping insertion in model container [2022-07-12 08:49:30,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:49:30" (1/1) ... [2022-07-12 08:49:30,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 08:49:30,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 08:49:31,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_5.i[1226,1239] [2022-07-12 08:49:31,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_5.i[2862,2875] [2022-07-12 08:49:31,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:49:31,070 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 08:49:31,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_5.i[1226,1239] [2022-07-12 08:49:31,089 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_5.i[2862,2875] [2022-07-12 08:49:31,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:49:31,102 INFO L208 MainTranslator]: Completed translation [2022-07-12 08:49:31,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31 WrapperNode [2022-07-12 08:49:31,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 08:49:31,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 08:49:31,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 08:49:31,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 08:49:31,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (1/1) ... [2022-07-12 08:49:31,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (1/1) ... [2022-07-12 08:49:31,134 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2022-07-12 08:49:31,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 08:49:31,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 08:49:31,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 08:49:31,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 08:49:31,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (1/1) ... [2022-07-12 08:49:31,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (1/1) ... [2022-07-12 08:49:31,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (1/1) ... [2022-07-12 08:49:31,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (1/1) ... [2022-07-12 08:49:31,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (1/1) ... [2022-07-12 08:49:31,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (1/1) ... [2022-07-12 08:49:31,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (1/1) ... [2022-07-12 08:49:31,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 08:49:31,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 08:49:31,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 08:49:31,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 08:49:31,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (1/1) ... [2022-07-12 08:49:31,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:49:31,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:49:31,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 08:49:31,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 08:49:31,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 08:49:31,291 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-12 08:49:31,291 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-12 08:49:31,291 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-12 08:49:31,293 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-12 08:49:31,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 08:49:31,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 08:49:31,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 08:49:31,357 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 08:49:31,359 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 08:49:31,580 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 08:49:31,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 08:49:31,586 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 08:49:31,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:49:31 BoogieIcfgContainer [2022-07-12 08:49:31,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 08:49:31,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 08:49:31,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 08:49:31,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 08:49:31,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 08:49:30" (1/3) ... [2022-07-12 08:49:31,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c17d13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:49:31, skipping insertion in model container [2022-07-12 08:49:31,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:31" (2/3) ... [2022-07-12 08:49:31,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c17d13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:49:31, skipping insertion in model container [2022-07-12 08:49:31,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:49:31" (3/3) ... [2022-07-12 08:49:31,595 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_5.i [2022-07-12 08:49:31,607 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 08:49:31,607 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 08:49:31,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 08:49:31,686 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c45ed65, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@33026656 [2022-07-12 08:49:31,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 08:49:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:49:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 08:49:31,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:49:31,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:49:31,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:49:31,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:49:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-12 08:49:31,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:49:31,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011405889] [2022-07-12 08:49:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:49:31,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:49:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:49:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:49:31,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:49:31,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011405889] [2022-07-12 08:49:31,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011405889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:49:31,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:49:31,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 08:49:31,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405234605] [2022-07-12 08:49:31,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:49:31,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 08:49:31,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:49:32,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 08:49:32,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 08:49:32,032 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:49:32,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:49:32,111 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-07-12 08:49:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 08:49:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 08:49:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:49:32,124 INFO L225 Difference]: With dead ends: 96 [2022-07-12 08:49:32,125 INFO L226 Difference]: Without dead ends: 39 [2022-07-12 08:49:32,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 08:49:32,132 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:49:32,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 134 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:49:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-12 08:49:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-07-12 08:49:32,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:49:32,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-12 08:49:32,176 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-07-12 08:49:32,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:49:32,176 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-12 08:49:32,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:49:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-12 08:49:32,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 08:49:32,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:49:32,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:49:32,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 08:49:32,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:49:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:49:32,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2022-07-12 08:49:32,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:49:32,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966494511] [2022-07-12 08:49:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:49:32,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:49:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:49:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:49:32,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:49:32,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966494511] [2022-07-12 08:49:32,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966494511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:49:32,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:49:32,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 08:49:32,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416952682] [2022-07-12 08:49:32,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:49:32,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 08:49:32,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:49:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 08:49:32,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 08:49:32,268 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:49:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:49:32,340 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-12 08:49:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 08:49:32,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 08:49:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:49:32,343 INFO L225 Difference]: With dead ends: 39 [2022-07-12 08:49:32,343 INFO L226 Difference]: Without dead ends: 33 [2022-07-12 08:49:32,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 08:49:32,347 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:49:32,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:49:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-12 08:49:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-12 08:49:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:49:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-07-12 08:49:32,361 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-07-12 08:49:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:49:32,364 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-07-12 08:49:32,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:49:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-07-12 08:49:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 08:49:32,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:49:32,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:49:32,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 08:49:32,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:49:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:49:32,368 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-07-12 08:49:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:49:32,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580631458] [2022-07-12 08:49:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:49:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:49:32,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:49:32,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341836423] [2022-07-12 08:49:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:49:32,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:49:32,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:49:32,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 08:49:32,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 08:49:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:49:32,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 08:49:32,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:49:59,859 WARN L233 SmtUtils]: Spent 24.56s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:50:17,668 WARN L233 SmtUtils]: Spent 8.81s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:50:42,941 WARN L233 SmtUtils]: Spent 13.70s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:51:11,001 WARN L233 SmtUtils]: Spent 11.82s on a formula simplification. DAG size of input: 37 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:51:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:51:11,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:51:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:51:30,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:51:30,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580631458] [2022-07-12 08:51:30,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:51:30,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341836423] [2022-07-12 08:51:30,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341836423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:51:30,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:51:30,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-12 08:51:30,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834754570] [2022-07-12 08:51:30,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:51:30,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 08:51:30,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:51:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 08:51:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=198, Unknown=20, NotChecked=0, Total=272 [2022-07-12 08:51:30,356 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:51:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:51:30,728 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-07-12 08:51:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 08:51:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 08:51:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:51:30,731 INFO L225 Difference]: With dead ends: 41 [2022-07-12 08:51:30,731 INFO L226 Difference]: Without dead ends: 35 [2022-07-12 08:51:30,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 115.2s TimeCoverageRelationStatistics Valid=63, Invalid=223, Unknown=20, NotChecked=0, Total=306 [2022-07-12 08:51:30,732 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:51:30,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 291 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-12 08:51:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-12 08:51:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-07-12 08:51:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:51:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-07-12 08:51:30,743 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-07-12 08:51:30,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:51:30,743 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-07-12 08:51:30,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:51:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-07-12 08:51:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 08:51:30,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:51:30,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:51:30,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 08:51:30,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:51:30,946 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:51:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:51:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash 20667420, now seen corresponding path program 1 times [2022-07-12 08:51:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:51:30,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168541945] [2022-07-12 08:51:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:51:30,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:51:30,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:51:30,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252371701] [2022-07-12 08:51:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:51:30,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:51:30,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:51:30,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 08:51:30,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 08:51:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:51:31,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 08:51:31,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:51:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:51:47,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:51:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:51:55,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:51:55,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168541945] [2022-07-12 08:51:55,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:51:55,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252371701] [2022-07-12 08:51:55,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252371701] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:51:55,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:51:55,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-07-12 08:51:55,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772817748] [2022-07-12 08:51:55,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:51:55,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 08:51:55,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:51:55,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 08:51:55,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=179, Unknown=8, NotChecked=0, Total=240 [2022-07-12 08:51:55,721 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:51:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:51:56,474 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-07-12 08:51:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 08:51:56,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 08:51:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:51:56,475 INFO L225 Difference]: With dead ends: 46 [2022-07-12 08:51:56,475 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 08:51:56,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=62, Invalid=202, Unknown=8, NotChecked=0, Total=272 [2022-07-12 08:51:56,476 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 08:51:56,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 281 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-07-12 08:51:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 08:51:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-12 08:51:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:51:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-07-12 08:51:56,481 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2022-07-12 08:51:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:51:56,481 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-07-12 08:51:56,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:51:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-07-12 08:51:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 08:51:56,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:51:56,482 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:51:56,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 08:51:56,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 08:51:56,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:51:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:51:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 2 times [2022-07-12 08:51:56,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:51:56,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427395253] [2022-07-12 08:51:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:51:56,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:51:56,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:51:56,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031571810] [2022-07-12 08:51:56,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 08:51:56,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:51:56,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:51:56,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 08:51:56,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 08:51:56,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 08:51:56,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 08:51:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 08:51:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:52:17,257 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (let ((.cse3 (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse2 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse1 (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse0 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse2))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse0 256)) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse1) 256) 127) (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (<= .cse2 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse1 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (< 127 (mod (+ .cse0 (* 255 .cse2)) 256)))))) .cse3) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse6 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse5 (+ (- 256) .cse6))) (let ((.cse4 (mod .cse5 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (< 127 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse4) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse5) 256)) (< 127 .cse6) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (= (mod (+ .cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) 256) (+ |c_ULTIMATE.start_gcd_test_~b#1| 256))))))) .cse3) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse9 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse7 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse9)) (.cse8 (mod .cse9 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse7 256)) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse8) 256) 127) (< 127 (mod (+ .cse7 .cse9) 256)) (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (<= .cse9 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse8 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|))))) .cse3) (and .cse3 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse11 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse13 (+ (- 256) .cse11))) (let ((.cse10 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse13)) (.cse12 (mod .cse13 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (< 127 (mod (+ .cse10 (* 255 .cse11)) 256)) (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse10 256)) (< 127 .cse11) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (= .cse12 0) (= (mod .cse12 256) |c_ULTIMATE.start_gcd_test_~b#1|))))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse15 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse14 (+ (- 256) .cse15))) (let ((.cse16 (mod .cse14 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse14) 256)) (< 127 .cse15) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (= .cse16 0) (= (mod .cse16 256) |c_ULTIMATE.start_gcd_test_~b#1|)))))) .cse3) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int)) (let ((.cse18 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse17 (mod (+ (- 256) .cse18) |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse17 0)) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse17) 256) 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| (+ (- 256) (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|))) (= |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse17 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) 256))) (<= (mod .cse17 256) 127) (not (<= .cse18 127)))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int)) (let ((.cse22 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse19 (mod (+ (- 256) .cse22) |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse19 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse21 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse20 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| (+ (- 256) .cse21)))) (and (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (not (<= (mod (+ .cse20 (* 255 .cse21)) 256) 127)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse20 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|))))) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse19) 256) 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse19 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) 256))) (<= (mod .cse19 256) 127) (not (<= .cse22 127))))))) .cse3)))) is different from false [2022-07-12 08:52:53,910 WARN L233 SmtUtils]: Spent 13.90s on a formula simplification. DAG size of input: 76 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:52:58,023 WARN L833 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse1 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse1) 256))) (and (= 0 (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= .cse1 127) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (not (= .cse0 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse1 .cse0) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse4 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse5 (+ (- 256) .cse4))) (let ((.cse2 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse5) 256))) (let ((.cse3 (mod .cse5 .cse2))) (and (= (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (not (= .cse2 0)) (< 127 (mod (+ .cse3 .cse2) 256)) (< 127 .cse4) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse3 (* 255 .cse2)) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse9 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse10 (+ (- 256) .cse9))) (let ((.cse8 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse10) 256))) (let ((.cse6 (mod .cse10 .cse8)) (.cse7 (mod .cse8 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse6 0)) (= (mod .cse7 256) 0) (<= (mod (+ .cse6 .cse8) 256) 127) (< 127 .cse9) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse6 (* 255 .cse8)) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|) (< 127 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7) 256))))))))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-07-12 08:53:22,582 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:53:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-12 08:53:28,267 INFO L328 TraceCheckSpWp]: Computing backward predicates...